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equipment
win
holt
Operating Instructions (continued)
BOX TEMPERATURE HEATER CONTROL
Table 1
Behavior / Selected Units
°F
°C
“N” Index
Heater(s) turn off (temperature increasing)
Se 2
Se 1
Se 2 °F
Heater(s) turn on (temperature decreasing)
Setpoint – 2
Setpoint – 1
Setpoint – 2 °F
The Control implements a three-stage power algorithm during Box Temperature Control to
minimize power consumption, improve temperature consistency, and minimize relay cycles.
There are two Heaters available to heat the box: 900 W and 600 W.
There are three stages of heat that can be used:
Stage 1
= 600 W
Stage 2
= 900 W
Stage 3
= 900 W + 600 W = 1500 W.
When initially entering “HEAT” mode or if the user increases the “SETPOINT” while in
“HEAT” mode, the Control uses Stage 3 to reach its setpoint as quickly as possible.
If, during any heating cycle, the setpoint is reached before 4 minutes elapse, the next
heating cycle begins with the next lower stage.
If, during any heating cycle, the setpoint is not reached before 8 minutes elapse, the
control immediately uses the next higher stage and the next heating cycle will begin
with that higher stage.
Humidity [Temperature]
Humidity [Temperature] is indicated on the right-hand 3-digit display,
only
in “PROOF”
mode.
Throughout this document, humidity refers to the Water Pan Temperature, since humidity is not
directly sensed.
In “HEAT” mode, “---“ is displayed. The Humidity Setpoint ranges from 1.0 through 9.0 with a
resolution of 0.5. See Table 2.
